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    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <script>
      var minDistance = function (word1, word2) {
        let dp = new Array(word1.length + 1).fill().map(() => new Array(word2.length + 1).fill(0))
        for (let i = 0; i <= word1.length; i++) {
          dp[i][0] = i
        }
        for (let j = 0; j <= word2.length; j++) {
          dp[0][j] = j
        }
        for (let i = 1; i <= word1.length; i++) {
          for (let j = 1; j <= word2.length; j++) {
            if (word1[i - 1] == word2[j - 1]) {
              dp[i][j] = dp[i - 1][j - 1]
            } else {
              dp[i][j] = Math.min(dp[i - 1][j - 1], dp[i - 1][j], dp[i][j - 1]) + 1
            }
          }
        }

        return dp[word1.length][word2.length]
      }
    </script>
  </body>
</html>
